Can I keep my existing base?

Thank you so much for your website. Do you offer advice on other aspects of life!

We saved up hard and bought an expensive mattress. We are dairy farmers and back support is very important to us. We have been most disappointed that the mattress hasn't been as comfy as in the shop and sinking slightly in the middle. I had come to the conclusion we needed a new bed base too and I was horrified to learn it would cost so much more to buy these separately. I'm going to give the MDF and old duvet a try first. I will let you know how we get on. Thanks again.